文具店出售定价分别为8元和12元的两种纪念册,且两种纪念册的进价都是定价的70%,小文具店出售定价分别为8元和12元的两种纪念册,且两种纪念册的进价都是定价的70%,小明共带108元钱,他欲买
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文具店出售定价分别为8元和12元的两种纪念册,且两种纪念册的进价都是定价的70%,小文具店出售定价分别为8元和12元的两种纪念册,且两种纪念册的进价都是定价的70%,小明共带108元钱,他欲买
文具店出售定价分别为8元和12元的两种纪念册,且两种纪念册的进价都是定价的70%,小
文具店出售定价分别为8元和12元的两种纪念册,且两种纪念册的进价都是定价的70%,小明共带108元钱,他欲买一定数量的某一种纪念册,若买每册12元的钱不够,但文具店老板考虑到定价为12元的纪念册不太好出售,于是如数给了小明这种纪念册,结果文具店获利和卖出同数量的每册8元的纪念册一样多,那么小明共买了多少本纪念册?
可怜可怜我吧,纯手打的.= .=..
文具店出售定价分别为8元和12元的两种纪念册,且两种纪念册的进价都是定价的70%,小文具店出售定价分别为8元和12元的两种纪念册,且两种纪念册的进价都是定价的70%,小明共带108元钱,他欲买
∵赚的与卖8元的一样多 ∴每册赚8*30%=2.4元
则12元的每册进价12*70%=8.4元
则老板每册卖给他每册8.4+2.4=10.8元
则一共卖了108/10.8=10本
方程:设买了x本.
108-12•70%x=8(1-70%)x
x=10
设买x册,由题意有x>108/12=9, 108-12•70%x=8(1-70%)x 解得x=10 思路:等式左边表示售价108元减去老板的成本,右边表示卖一件8元产品的利润乘以卖的册数
10
转的与卖8元的一样多说明每册赚8*30%=2.4元
卖12元的每册进价12*70%=8.4元
则老板每册卖给他每册8.4+2.4=10.8元
则一共卖了108/10.8=10册
x本
x=10
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